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| Number | Title | Issue Date |
| 7915475 | Metal remediation using a mesoporous nanocomposite A novel method for remediating metals includes treating the metals with a mesoporous nanocomposite such as HMS, MCM-41 or MCM-48. The metal is preferably lead but can be at least one metal selected from Pb, Hg, Cd, Zn, Sn, As, Sb, In, Se, Ga, Te, Bi, Ni, Cu, Mo, Ni,... | 03/29/2011 |
| 7692058 | Mercury contamination extraction Mercury is removed from contaminated waste by firstly applying a sulfur reagent to the waste. Mercury in the waste is then permitted to migrate to the reagent and is stabilized in a mercury sulfide compound. The stable compound may then be removed from the waste whi... | 04/06/2010 |
| 7589248 | Mercury contamination extraction Mercury is removed from contaminated waste by firstly applying a sulfur reagent to the waste. Mercury in the waste is then permitted to migrate to the reagent and is stabilized in a mercury sulfide compound. The stable compound may then be removed from the waste whi... | 09/15/2009 |
| 7399268 | Method for treatment of arsenic-contaminated soil Disclosed herein is a method for treatment of arsenic-contaminated soil, said method being capable of insolubilizing arsenic compounds (in organic form or tri- or pentavalent inorganic form), thereby reducing their leaching level below the environmental standard val... | 07/15/2008 |
| 7321073 | Process for treating low solids content hazardous materials A high temperature and high pressure process utilizes dehaloganation, oxidation, or similar reactions to chemically alter hazardous organic chemicals to render them non-hazardous. The method is particularly adaptable to the treatment of sediments in bodies of water ... | 01/22/2008 |
| 7297318 | Method of removing heavy metals from silicate sources during silicate manufacturing Methods for the removal of lead from a metal silicate during the process of manufacturing of such a material are provided. With the reliance upon lower cost starting silicon dioxide starting materials that are known to exhibit elevated amounts of heavy metal therein... | 11/20/2007 |
| 7273962 | Compositions and methods for removing heavy metals from contaminated samples using membranes provided with purified metallothionein (MT) proteins Devices, such as solid supports having metal binding proteins, such as metallothionein proteins, bound thereto are disclosed for removing metals from substrates in need of having such metals removed therefrom. Specifically membranes having metallothionein proteins f... | 09/25/2007 |
| 7265254 | Waste processing method, waste processing system, integrated waste processing method, and integrated waste processing system Chlorine-containing waste is processed inside a heating device, an alkali metal compound and a calcium compound are given into the heating device while the temperature of a solid phase inside the heating device is maintained at 400 to 1500° C., chlorine that is con... | 09/04/2007 |
| 7201885 | Method of removing heavy metals from silicate sources during silicate manufacturing Methods for the removal of lead from a metal silicate during the process of manufacturing of such a material are provided. With the reliance upon lower cost starting silicon dioxide starting materials that are known to exhibit elevated amounts of heavy metal therein... | 04/10/2007 |
| 7160526 | Process for detoxification of CCA-treated wood A chemical process for detoxifying spent CCA (copper, chrome, arsenic)—treated wood, from which CCA and detoxified wood are recovered for recycling comprising the steps of (a) treating CCA-treated wood in the presence of a liquefying reagent such as an organic sol... | 01/09/2007 |
| 7135605 | Metal binding proteins and associated methods Metal binding proteins, associated compositions and methods for their production and use are disclosed. The metal binding proteins include have amino acid sequences analogous to at least one metal binding protein, and conservative amino acid substitutions thereof fr... | 11/14/2006 |
| 7121995 | Method for stabilization of lead smelter slag and matte This invention provides a method for stabilization of lead smelter slag and matte subject to acid and water leaching tests or leach conditions by addition of stabilizing agents into the smelter feed such that leaching of lead is inhibited to desired levels. The resu... | 10/17/2006 |
| 7087120 | System and method for chemical decontamination of radioactive material A method for chemically decontaminating radioactive material. The method includes reducing-dissolving step for setting surface of radioactive material in contact with reducing decontamination liquid including mono-carboxylic acid and di-carboxylic acid as dissolvent... | 08/08/2006 |
| 6984769 | Treatment of surfaces to stabilize heavy metals A reactive coating composition and method for treating a surface including heavy metals by applying the reactive coating composition to the surface. The surface can be, for example, a paint layer containing heavy metals. The reactive coating composition includes a s... | 01/10/2006 |
| 6924409 | Method for reducing the leaching of oxyanion forming elements, in particular chromium, from hazardous waste In a method for reducing the leaching of oxyanion forming elements, in particular chromium, from materials containing environmentally noxious constituents, especially from incineration residues, especially flue gas cleaning products from waste incineration, in parti... | 08/02/2005 |
| 6638204 | Method of disposal of waste containing heavy metal (A) Heavy metal-containing wastes are kneaded in melt with (B) an alkali metal compound or an alkaline earth metal compound and (C) sulfur, or with (E) a sulfide, or with these along with (D) a salt of a metal of which the standard electrode potential is ... | 10/28/2003 |
| 6623646 | In-situ chemical oxidation-reduction and precipitation of heavy metals in soils and groundwater A method is taught for converting metal contaminants in the soil to less toxic forms as well as permitting their removal from groundwater. A first reactive solution comprising ferrous sulfate and an acid selected from the group consisting of sulfuric acid... | 09/23/2003 |
| 6619218 | Method and apparatus for making a pollutant harmless A method for making harmless a material to be treated containing a pollutant, including the steps of arranging a pair of ejecting nozzles such that nozzle openings thereof are opposed to each other inside a pressure-proof furnace, thermally treating that ... | 09/16/2003 |
| 6238570 | Method for treating aqueous composition contaminants A non-iron sulfide is introduced into an iron-containing zone to form ferrous sulfide. A contaminated aqueous composition is then contacted with the ferrous sulfide to react with said contaminants.... | 05/29/2001 |
| 6143136 | Method and apparatus for physical and chemical separation and reaction A method and apparatus for separating volatile from nonvolatile substances, separation of volatile substances, one from the other, and for performing various chemical reactions. In particular, an apparatus which performs these functions utilizing a combin... | 11/07/2000 |
| 5858059 | Method for injecting feed streams into a molten bath First and second feed streams are injected into a molten bath, thereby creating first and second jets. The first and second jets combine to form a substantially planar, or fan jet, region within the molten bath. The first and second feed streams can inclu... | 01/12/1999 |
| 5827574 | Method of nonhazardous removal of paint containing heavy metals and coating preparation for performing the same The present invention involves a method of removing paint containing heavy metal from a surface without the production of hazardous wastes. Specifically, this method involves applying a coating preparation to the heavy metal containing paint prior to its ... | 10/27/1998 |
| 5813969 | Process for detoxicating noxious wastes Noxious wastes are detoxicated by admixing a detoxicating agent to noxious wastes containing heavy metals, PCB, or the like and eliminating noxious materials in the wastes, in which the detoxicating agent comprises sodium, potassium, calcium, lithium, bar... | 09/29/1998 |
| 5810920 | Method for treating wastes To treat waste containing harmful metals such as lead, cadmium, mercury, chromium, copper, nickel, zinc, etc., the waste is mixed with a treating agent containing, as the essential constituent component, solid acid(s) and/or cement and additionally a caki... | 09/22/1998 |
| 5803663 | Mercury-removal method A method of removing one or more mercury compounds from mercury-contaminated soil is disclosed. The method includes mixing the mercury-contaminated soil with an additive, and heating the thus produced mixture to a temperature which is below the boiling po... | 09/08/1998 |
| 5795285 | Conversion of contaminated sediments into useful products by plasma melting A system for treating contaminated sediments dredged from waterways is disclosed. Dredged sediments are divided into coarse and fine fractions. The coarse fraction is washed to remove contaminants. The fine fraction and the contaminants removed from the c... | 08/18/1998 |
| 5766303 | Process for the remediation of lead-contaminated soil and waste battery casings Lead-contaminated soil and battery casings are remediated using a plasma arc furnace which pyrolyzes the soil and waste battery casings so as to form a vitrified slag and a combustible gas, respectively. The combustible gas along with volatilized lead (an... | 06/16/1998 |
| 5743937 | Earth melter with rubble walls and method of use The present invention is an improvement to the earth melter described and claimed in U.S. Pat. No. 5,443,618. The improvement is the use of rubble for retaining walls. More specifically, the retaining walls rest on ground level and extend above ground lev... | 04/28/1998 |
| 5688378 | Photoassisted oxidation of species in solution The invention relates to methods and processes for the photoassisted oxidation of dissolved species such as arsenic, iron, phosphorous and sulphur. Each aspect of the invention involves supplying to a solution including the species to be oxidized, an oxid... | 11/18/1997 |
| 5678783 | System and method for remediation of selected atmospheric conditions and system for high altitude telecommunications The system includes a platform assembly which includes a plurality of helium airships for support of an emitting electrode to produce a large amount of electrical charges, in the form of electrons, into the surrounding atmosphere. The electrons may be gen... | 10/21/1997 |
| 5607654 | Method for minimizing environmental release of toxic compounds in the incineration of wastes A method and apparatus for minimizing the environmental release of acids and toxic organic compounds from a waste incinerator-air pollution control train. The apparatus comprises an incinerator, a gas cooling means such as a waste heat boiler or quench ch... | 03/04/1997 |
| 5599372 | Process for removing metal contaminants from soils A multi-step process for treating soil that has become contaminated with heavy metals is disclosed. The process may be conducted on the site where contaminated soil is present and allows replacement of the original contaminated soil with decontaminated so... | 02/04/1997 |
| 5550314 | Method of environmentally stabilizing lead paint contaminated debris A method of immobilizing or stabilizing lead paint contaminated construction or demolition debris in which the debris is shredded, mixed with water and a chemical, such as fly ash, lime, Portland cement or kiln dust. The treated debris is then collected a... | 08/27/1996 |
| 5536899 | Stabilization of lead bearing waste A method is disclosed for reducing the leaching of lead from a lead bearing waste, The method includes contacting the waste with a water soluble phosphate and a complexing agent, wherein the complexing agent is at least slightly water soluble, whereby a l... | 07/16/1996 |
| 5512702 | Method for in-situ immobilization of lead in contaminated soils, wastes, and sediments using solid calcium phosphate materials Solid calcium phosphate materials are used for in-situ immobilization of lead contaminated soils, wastes, and sediments by mixing the solid calcium phosphate material with the lead contaminated material and leaving the mixture in place. The solid calcium ... | 04/30/1996 |
| 5503813 | Molybdenum recovery from epoxidate Epoxidate from the molybdenum catalyzed epoxidation of an olefin such as propylene with a hydroperoxide such as ethylbenzene hydroperoxide is treated with 2 to 15 times the stoichiometric equivalent of aqueous base such as sodium hydroxide to form Na... | 04/02/1996 |
| 5489734 | Method for producing a non-radioactive product from a radioactive waste A method is disclosed for producing a non-radioactive product from a radioactive waste composition that includes a radioactive component and a non-radioactive component. The method includes directing the radioactive waste into a molten metal bath. A separ... | 02/06/1996 |
| 5476990 | Waste management facility An industrial waste management facility (IWMF) for disposing of spent potlining includes a co-current gas-fired rotary kiln for containing a molten pool of spent potlining throughout the entire length of the rotary kiln from the inlet to the outlet, an as... | 12/19/1995 |
| 5304710 | Method of detoxification and stabilization of soils contaminated with chromium ore waste A method for treating chromium ore waste contaminated soils by detoxification, fixation, immobilization and stabilization comprising the steps of soil grinding, pre-activating, reducing chromium valiancy, forming insoluble metal hydroxides, and incapsulat... | 04/19/1994 |
| 5300137 | Method for removing mercury from contaminated soils and industrial wastes and related apparatus A method and an apparatus for removing mercury from contaminated soils and industrial wastes are provided. The removed mercury may be recovered. A furnace vaporizes the mercury containing portion and the vapors are condensed. In one embodiment, an individ... | 04/05/1994 |
